Supplemental spring for automobiles.



B. D. BISHOP.

SUPPLEMENTAL SPRING FOR AUTOMOBILES.

APPLICATION FILED AUG. 31', 1908.

956,033.. Patented Apr.26,1910.

6% I M a w fii g UNITED STATES PATENT OFFICE.

BRENTON D. BISHOP, 0F BOSTON, JVIASSACHUSETTS.

SUPPLEMENTAL SPRING FOR AUTOMOBILES.

To all whom it may concern:

Be it known that I; BuENToN D. Blsuor, a citizen of the United States, residing-in Boston, county of Suffolk, and State of Massachusetts, have invented an Improvement in Supplemental Springs for Automobiles, of which the following description, in connection wit-h the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to a supplemental spring for use on automobiles as auxiliary to the body supporting springs of the ve hiole, and has for its object to provide a simple, inexpensive spring, which can 'be applied in a minimum time and with the leastpossible labor.

The supplemental spring is constructed as will be described so as to enable it to be used instead of the usual links, which.connect one end of the leaf spring to the chassis. F or this purpose, the supplemental spring is composed of a plurality of convolutions having their ends extended in the same direction to form arms which are bent at their ends in the plane of said arms to form eyes for the reception of bolts, one of said arms being offset. or bent so that its eye is brought in the same vertical plane as the eye of the other arm. These and other features of this invention will be pointed out in the claims at the end of this specification.

Figure 1 is aside elevation of a portionv of a chassis provided with a leaf spring which as connected at one end to the chassis by supplemental springs embodying tlns invention. Fig. 2, 1s a slde elevation on an "iilarged scale of the supplemental spring shown in Fig. 1 and Fig. 3, a lan view of the supplemental spring shown in Fig.- 1.

Referrin to the drawing, a represents a side bar 0% the chassis" of a motor vehicle or automobile, and b, a leaf spring, which supports the same upon an axle, not shown, to which the leaf spring is secured by the clip 0.

The leaf spring 6 is connected at one end to an arm (Z attached to the chassis, and usually the other end is connected by links to the hanger or bra-ket' e fastened to the side bar a.

to, and which not only increases the spring support for the'cha'ssis a and the body of the Specification of Letters Patent.

Application filed August 31, 1908.

Patented Apr. 26, 1910. Serial No. 450,954.

car secured to it, but also acts as a shock absorber and reduces to a minimum the liability of the main or leaf springs being broken when the car is driven over rough places in the road and especially at moderately high speed.

The supplemental spring referred to consists of a coil wire sprili having a plurality of convolutions hset suistantially close together and having their ends extended in the same direction to form arms 2', j, which are bent at their ends to form eyes It. One of the armsi, j, is ofiset or bent toward the other so that its eye It lies substantially in a vertical plane passing through the other eye as clearly represented in F 1g. 3, which enables the supplemental springs to be substituted for the straight links now commonly used on opposite sides of the hanger or bracket 0 for fastening the main or leaf spring I) to the chassis a. The supplemental springs can be connected with the opposite sides of the hanger e and of the leaf spring by the same bolts m, a, now used to connect the links to the hanger and leaf spring. Furthermore the supplemental springs can be used with their coils within or without the leaf spring, thereby enabling the said supplemental swings to be attached without interfering with other parts of th car.

, By reference to Fig. 1, it will be seen that additional spring action is provided, and also that the additional spring acts as a shock absorber, for as the leaf spring is moved upward toward the car, the arms 2', j,

in the spring hereinshown are brought toward each other and this movement is re sistcd by the winding up of the coils, whereas when the car rebounds, this latter movement tends to unwind the'coils and is resisted thereby. a

The supplemental spring hereinshown is provided with diverging arms and may be termed a compressing form of spring, but I do rot desire to limit the invention in this respect, as the arms 2', 7', may be normally close together and expanded by the action of the car, which latter form of spring may be termed an. expansion spring.

.It will be observed that the eyes 70 are formed by bending the ends of the arms '5, j, in the direction of their length so that the axes of said eyes are substantially parallel with the axis of the coil h, and as a result the supplemental spring can be used as a substitute for the usual links employed to connect theleaf spring with the frame of the Y vehicle, and the'spring action desired can be 1. The combination with a motor vehicle provided with leaf supporting springs, of

supplemental springs each comprising a coil having arms extended in the same direction and. bent at their ends in the plane of said arms to form eyes having their axes parallel with the axis of the said coil, and bolts pass ing through said eyes to connect the leaf spring with the framework of said vehicle.

2. The combination with a motor vehicle provided'with leaf supporting springs, of

supplemental springs having coils provided at their opposite ends with arms extended from them and bent at their ends in the plane of said arms to form eyes having their" the vehicle with the axes of the coils arranged transversely of the leaf springs, and means enga ing said eyes out of line with the said 0011s to attach the supplemental springs to the leaf springs and to the frame I eyes having their axes parallel with the axis of said coil, one ofsaid arms being bentor ofiset over the coil toward the other of said arms to bring the eyes of both arms into substantially the same plane, substantially as described.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

BRENTON D. BISHOP.

Witnesses:

JAs. H. CHUROHI'LL, J. MURPHY. 

